Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Influence of parameters study on accuracy of simulation model verification for fragment penetration
| DOI: | 10.11809/bqzbgcxb2024.06.005 |
| Keywords: | fragments; penetration; verification accuracy; critical penetration |
| Abstract: | Due to incomplete or missing attitude data of fragments while hitting the target, and the lack of simulation standards for critical penetration problems, it is difficult to validate simulation models precisely. In order to address the above problem, a parameter for the simulation model verification by using specific kinetic energy of fragment is proposed from the perspective of energy. Meanwhile, accuracy formulas for simulation model verification are constructed for three types of damage modes such as the complete penetration, embedding, and critical penetration of fragments. Based on the energy formula for fragment penetration loss, a relationship among the velocity increment of fragment and velocity of critical penetration, residual velocity of fragment, and growth ratio of fragment velocity is established. The results indicate that, for the complete penetration mode of fragment and in the absence of attitude data of fragments while hitting the target, the parameter for the simulation model verification is the specific kinetic energy of fragment. In addition, for the mode of critical penetration of fragments, the parameter for the simulation model verification is the specific kinetic energy of fragment as well. The higher the velocity of fragment testing used for the comparison between simulation and experiment, the stronger the feasibility of simulation model verification. For a missile target system with a critical penetration velocity of 70 m/s or above, the standard value of residual velocity for the critical penetration of fragment is recommended as 20 m/s. |
| Published: | 2024-06-28 |